/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:49:14,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:49:14,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:49:14,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 04:49:14,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 04:49:14,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 04:49:14,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 04:49:14,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 04:49:14,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 04:49:14,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 04:49:14,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 04:49:14,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 04:49:14,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 04:49:14,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 04:49:14,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 04:49:14,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 04:49:14,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 04:49:14,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 04:49:14,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 04:49:14,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 04:49:14,664 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 04:49:14,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 04:49:14,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 04:49:14,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 04:49:14,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 04:49:14,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 04:49:14,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:49:14,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:49:14,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:49:14,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 04:49:14,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:49:14,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:49:14,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 04:49:14,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 04:49:14,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 04:49:14,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 04:49:14,700 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 04:49:14,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:49:14,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:49:14,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:14,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 04:49:14,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 04:49:14,703 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:49:14,703 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:49:14,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:49:14,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:49:14,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:49:14,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:49:14,900 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:49:14,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-04-05 04:49:14,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ba202d6/de52da57ccba46c5bea969c15824feb1/FLAG71ce463fa [2022-04-05 04:49:15,290 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:49:15,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-04-05 04:49:15,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ba202d6/de52da57ccba46c5bea969c15824feb1/FLAG71ce463fa [2022-04-05 04:49:15,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63ba202d6/de52da57ccba46c5bea969c15824feb1 [2022-04-05 04:49:15,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:49:15,318 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:49:15,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:15,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:49:15,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:49:15,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac7bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15, skipping insertion in model container [2022-04-05 04:49:15,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:49:15,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:49:15,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-04-05 04:49:15,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:15,527 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:49:15,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-04-05 04:49:15,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:15,576 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:49:15,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15 WrapperNode [2022-04-05 04:49:15,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:15,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:49:15,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:49:15,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:49:15,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:49:15,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:49:15,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:49:15,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:49:15,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:15,699 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 04:49:15,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 04:49:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:49:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:49:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:49:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 04:49:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:49:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:49:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:49:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:49:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:49:15,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:49:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:49:15,770 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:49:15,771 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:49:15,867 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:49:15,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:49:15,871 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-05 04:49:15,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:15 BoogieIcfgContainer [2022-04-05 04:49:15,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:49:15,873 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:49:15,873 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:49:15,874 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:49:15,876 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,877 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 04:49:15,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:15 BasicIcfg [2022-04-05 04:49:15,888 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:49:15,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:49:15,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:49:15,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:49:15,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:49:15" (1/4) ... [2022-04-05 04:49:15,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c9a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:15, skipping insertion in model container [2022-04-05 04:49:15,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15" (2/4) ... [2022-04-05 04:49:15,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c9a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:15, skipping insertion in model container [2022-04-05 04:49:15,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:15" (3/4) ... [2022-04-05 04:49:15,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496c9a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:49:15, skipping insertion in model container [2022-04-05 04:49:15,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:15" (4/4) ... [2022-04-05 04:49:15,894 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.cqvasr [2022-04-05 04:49:15,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:49:15,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:49:15,926 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:49:15,930 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 04:49:15,930 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:49:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 04:49:15,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:15,943 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:15,944 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1926103570, now seen corresponding path program 1 times [2022-04-05 04:49:15,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:15,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683960866] [2022-04-05 04:49:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:16,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683960866] [2022-04-05 04:49:16,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683960866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:16,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 04:49:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989440684] [2022-04-05 04:49:16,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:16,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 04:49:16,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:16,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 04:49:16,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 04:49:16,154 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:16,205 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-04-05 04:49:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 04:49:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 04:49:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:16,211 INFO L225 Difference]: With dead ends: 58 [2022-04-05 04:49:16,211 INFO L226 Difference]: Without dead ends: 28 [2022-04-05 04:49:16,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 04:49:16,220 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:16,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-05 04:49:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-05 04:49:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 04:49:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-04-05 04:49:16,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2022-04-05 04:49:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:16,260 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-04-05 04:49:16,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-04-05 04:49:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 04:49:16,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:16,261 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:16,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:49:16,261 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1448912944, now seen corresponding path program 1 times [2022-04-05 04:49:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:16,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528515136] [2022-04-05 04:49:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:16,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:16,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528515136] [2022-04-05 04:49:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528515136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 04:49:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339436585] [2022-04-05 04:49:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:16,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 04:49:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 04:49:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 04:49:16,413 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:16,568 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-04-05 04:49:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 04:49:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:16,569 INFO L225 Difference]: With dead ends: 53 [2022-04-05 04:49:16,569 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 04:49:16,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:16,571 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:16,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 04:49:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-05 04:49:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 04:49:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-04-05 04:49:16,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-04-05 04:49:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:16,577 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-04-05 04:49:16,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-04-05 04:49:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 04:49:16,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:16,579 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:16,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:49:16,579 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1246349198, now seen corresponding path program 1 times [2022-04-05 04:49:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:16,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408249607] [2022-04-05 04:49:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:16,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408249607] [2022-04-05 04:49:16,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408249607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513998224] [2022-04-05 04:49:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:16,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:16,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:16,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 04:49:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 04:49:16,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:16,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 04:49:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513998224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:16,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 04:49:16,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-05 04:49:16,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881815597] [2022-04-05 04:49:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:16,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 04:49:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 04:49:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-05 04:49:16,923 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:16,966 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-05 04:49:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 04:49:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-05 04:49:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:16,969 INFO L225 Difference]: With dead ends: 49 [2022-04-05 04:49:16,969 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 04:49:16,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:16,973 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:16,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 04:49:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-05 04:49:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 04:49:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-04-05 04:49:16,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-04-05 04:49:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:16,985 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-04-05 04:49:16,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-04-05 04:49:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:49:16,987 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:16,988 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:17,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:17,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:17,204 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 931318849, now seen corresponding path program 1 times [2022-04-05 04:49:17,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942837667] [2022-04-05 04:49:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:17,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942837667] [2022-04-05 04:49:17,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942837667] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305229769] [2022-04-05 04:49:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:17,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:17,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 04:49:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 04:49:17,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:17,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305229769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:17,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-05 04:49:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984591414] [2022-04-05 04:49:17,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:17,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 04:49:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 04:49:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-05 04:49:17,595 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:17,751 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-04-05 04:49:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 04:49:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:17,753 INFO L225 Difference]: With dead ends: 61 [2022-04-05 04:49:17,753 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 04:49:17,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-04-05 04:49:17,754 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:17,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 63 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 04:49:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-04-05 04:49:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 04:49:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-05 04:49:17,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2022-04-05 04:49:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:17,761 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-05 04:49:17,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-05 04:49:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:49:17,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:17,762 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:17,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:17,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 04:49:17,975 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1459507809, now seen corresponding path program 2 times [2022-04-05 04:49:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135094221] [2022-04-05 04:49:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:18,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135094221] [2022-04-05 04:49:18,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135094221] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593233305] [2022-04-05 04:49:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:18,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:18,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:18,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 04:49:18,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:18,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 04:49:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:18,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-05 04:49:18,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-05 04:49:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:49:18,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:49:18,778 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:49:18,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:49:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:18,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:19,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593233305] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:19,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 04:49:19,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 15] total 31 [2022-04-05 04:49:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610314524] [2022-04-05 04:49:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:19,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 04:49:19,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 04:49:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-04-05 04:49:19,105 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:19,176 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-04-05 04:49:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 04:49:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-05 04:49:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:19,177 INFO L225 Difference]: With dead ends: 49 [2022-04-05 04:49:19,177 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 04:49:19,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 04:49:19,178 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:19,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-04-05 04:49:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 04:49:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-04-05 04:49:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:19,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-04-05 04:49:19,188 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2022-04-05 04:49:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:19,188 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-04-05 04:49:19,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-04-05 04:49:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:49:19,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:19,189 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:19,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:19,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:19,406 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1038508128, now seen corresponding path program 1 times [2022-04-05 04:49:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319924117] [2022-04-05 04:49:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:19,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319924117] [2022-04-05 04:49:19,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319924117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:19,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:19,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 04:49:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023286881] [2022-04-05 04:49:19,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:19,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 04:49:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 04:49:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 04:49:19,523 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:19,600 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-04-05 04:49:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 04:49:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-05 04:49:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:19,606 INFO L225 Difference]: With dead ends: 78 [2022-04-05 04:49:19,606 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 04:49:19,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-04-05 04:49:19,607 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:19,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 04:49:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-04-05 04:49:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-04-05 04:49:19,616 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 25 [2022-04-05 04:49:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:19,617 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-04-05 04:49:19,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-04-05 04:49:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:49:19,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:19,618 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:19,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-05 04:49:19,618 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1031689277, now seen corresponding path program 1 times [2022-04-05 04:49:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:19,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246016191] [2022-04-05 04:49:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:19,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246016191] [2022-04-05 04:49:19,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246016191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833878773] [2022-04-05 04:49:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:19,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:19,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:19,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:19,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 04:49:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 04:49:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:19,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833878773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:19,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:19,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-05 04:49:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349439083] [2022-04-05 04:49:19,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:19,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 04:49:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 04:49:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:19,848 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:20,005 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2022-04-05 04:49:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 04:49:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-05 04:49:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:20,006 INFO L225 Difference]: With dead ends: 91 [2022-04-05 04:49:20,006 INFO L226 Difference]: Without dead ends: 72 [2022-04-05 04:49:20,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-04-05 04:49:20,007 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:20,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 57 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-05 04:49:20,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2022-04-05 04:49:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:20,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-04-05 04:49:20,015 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2022-04-05 04:49:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:20,015 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-04-05 04:49:20,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-04-05 04:49:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 04:49:20,016 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:20,016 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:20,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:20,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:20,232 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash -765262082, now seen corresponding path program 1 times [2022-04-05 04:49:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:20,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894527424] [2022-04-05 04:49:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:20,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:20,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894527424] [2022-04-05 04:49:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894527424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275695396] [2022-04-05 04:49:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:20,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:20,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:20,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:20,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 04:49:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:20,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 04:49:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:20,741 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:49:20,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-05 04:49:20,947 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-05 04:49:20,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-04-05 04:49:21,109 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-04-05 04:49:21,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-04-05 04:49:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:21,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:21,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-04-05 04:49:21,751 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-05 04:49:21,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 771 treesize of output 711 [2022-04-05 04:49:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:23,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275695396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:23,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:23,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 14] total 42 [2022-04-05 04:49:23,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879381190] [2022-04-05 04:49:23,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:23,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-05 04:49:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-05 04:49:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1533, Unknown=2, NotChecked=0, Total=1722 [2022-04-05 04:49:23,351 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:32,284 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-04-05 04:49:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 04:49:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-05 04:49:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:32,285 INFO L225 Difference]: With dead ends: 105 [2022-04-05 04:49:32,285 INFO L226 Difference]: Without dead ends: 103 [2022-04-05 04:49:32,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=500, Invalid=4190, Unknown=2, NotChecked=0, Total=4692 [2022-04-05 04:49:32,287 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 107 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:32,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 163 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 644 Invalid, 0 Unknown, 370 Unchecked, 0.3s Time] [2022-04-05 04:49:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-05 04:49:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 60. [2022-04-05 04:49:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 53 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-04-05 04:49:32,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 30 [2022-04-05 04:49:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:32,293 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-04-05 04:49:32,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.575) internal successors, (63), 39 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-04-05 04:49:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:49:32,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:32,294 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:32,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:32,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:32,511 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1650775123, now seen corresponding path program 1 times [2022-04-05 04:49:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:32,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848706769] [2022-04-05 04:49:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:32,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848706769] [2022-04-05 04:49:32,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848706769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388631891] [2022-04-05 04:49:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:32,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:32,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:32,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:32,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 04:49:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:32,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 04:49:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:32,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:32,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388631891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:32,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:32,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-05 04:49:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327628913] [2022-04-05 04:49:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:32,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 04:49:32,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 04:49:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:32,710 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:32,911 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2022-04-05 04:49:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 04:49:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 04:49:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:32,912 INFO L225 Difference]: With dead ends: 132 [2022-04-05 04:49:32,912 INFO L226 Difference]: Without dead ends: 98 [2022-04-05 04:49:32,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-04-05 04:49:32,914 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 148 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:32,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 45 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-05 04:49:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2022-04-05 04:49:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-04-05 04:49:32,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-04-05 04:49:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:32,921 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-04-05 04:49:32,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-04-05 04:49:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 04:49:32,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:32,921 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:32,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:33,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:33,134 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:33,134 INFO L85 PathProgramCache]: Analyzing trace with hash -547485170, now seen corresponding path program 1 times [2022-04-05 04:49:33,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017051613] [2022-04-05 04:49:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:33,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 04:49:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:33,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017051613] [2022-04-05 04:49:33,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017051613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101027862] [2022-04-05 04:49:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:33,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:33,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:33,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 04:49:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 04:49:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:33,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101027862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:33,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:33,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-04-05 04:49:33,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159001260] [2022-04-05 04:49:33,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:33,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 04:49:33,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:33,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 04:49:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 04:49:33,500 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:33,741 INFO L93 Difference]: Finished difference Result 160 states and 193 transitions. [2022-04-05 04:49:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 04:49:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-05 04:49:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:33,742 INFO L225 Difference]: With dead ends: 160 [2022-04-05 04:49:33,742 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 04:49:33,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-04-05 04:49:33,743 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:33,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 04:49:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 04:49:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2022-04-05 04:49:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-04-05 04:49:33,748 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 33 [2022-04-05 04:49:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:33,749 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-04-05 04:49:33,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-04-05 04:49:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 04:49:33,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:33,749 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:33,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:33,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:33,968 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1553999756, now seen corresponding path program 2 times [2022-04-05 04:49:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661690999] [2022-04-05 04:49:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:34,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661690999] [2022-04-05 04:49:34,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661690999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119645250] [2022-04-05 04:49:34,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:34,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 04:49:34,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:34,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 04:49:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:34,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:49:34,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:49:34,514 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:49:34,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:49:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:49:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:34,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-04-05 04:49:34,686 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-05 04:49:34,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-04-05 04:49:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:49:34,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119645250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:34,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:34,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-04-05 04:49:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268971569] [2022-04-05 04:49:34,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:34,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 04:49:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:34,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 04:49:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-04-05 04:49:34,810 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:36,641 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2022-04-05 04:49:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-05 04:49:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-05 04:49:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:36,657 INFO L225 Difference]: With dead ends: 211 [2022-04-05 04:49:36,657 INFO L226 Difference]: Without dead ends: 174 [2022-04-05 04:49:36,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1045, Invalid=5117, Unknown=0, NotChecked=0, Total=6162 [2022-04-05 04:49:36,659 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:36,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 85 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 915 Invalid, 0 Unknown, 101 Unchecked, 0.8s Time] [2022-04-05 04:49:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-05 04:49:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 84. [2022-04-05 04:49:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:49:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-04-05 04:49:36,676 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-04-05 04:49:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:36,676 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-04-05 04:49:36,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-04-05 04:49:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 04:49:36,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:36,677 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:36,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:36,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 04:49:36,901 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1626243309, now seen corresponding path program 2 times [2022-04-05 04:49:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:36,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281502848] [2022-04-05 04:49:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:36,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:37,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281502848] [2022-04-05 04:49:37,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281502848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:37,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145388008] [2022-04-05 04:49:37,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:37,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:37,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:49:37,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 04:49:37,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 04:49:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:37,685 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:49:37,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-05 04:49:37,906 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-05 04:49:37,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-04-05 04:49:38,081 INFO L356 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2022-04-05 04:49:38,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-04-05 04:49:38,202 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-04-05 04:49:38,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-04-05 04:49:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:49:38,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:09,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-04-05 04:50:09,649 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-04-05 04:50:09,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5803 treesize of output 5609 [2022-04-05 04:50:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:50:49,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145388008] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:49,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:49,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 53 [2022-04-05 04:50:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593615175] [2022-04-05 04:50:49,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:49,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 04:50:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 04:50:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2447, Unknown=17, NotChecked=0, Total=2756 [2022-04-05 04:50:49,631 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:51:03,439 WARN L232 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:51:14,387 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~i~0 4))) (let ((.cse3 (+ .cse1 |c_main_~#v~0.offset| 4)) (.cse4 (+ |c_main_~#v~0.offset| 4))) (and (or (<= 1 c_main_~i~0) (let ((.cse0 (* c_main_~j~0 4))) (and (not (= .cse0 0)) (not (= (+ .cse0 4) 0)) (= .cse1 0))) (not |c_main_#t~short10|)) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_29 Int)) (or (<= 0 v_main_~i~0_29) (forall ((v_ArrVal_198 Int) (v_ArrVal_195 Int)) (or (let ((.cse2 (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_29 4) 4) v_ArrVal_195) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4) 4) v_ArrVal_198))) (<= (select .cse2 |c_main_~#v~0.offset|) (select .cse2 (+ |c_main_~#v~0.offset| 4)))) (not (<= v_ArrVal_195 c_main_~key~0)))) (not (<= c_main_~i~0 (+ v_main_~i~0_29 1))))) (not (= .cse3 0)) (not (= .cse3 .cse4)) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse5 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (+ (select .cse5 0) 1) (select .cse5 .cse4)))))) is different from false [2022-04-05 04:51:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:51:28,954 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-04-05 04:51:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 04:51:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-05 04:51:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:51:28,955 INFO L225 Difference]: With dead ends: 115 [2022-04-05 04:51:28,955 INFO L226 Difference]: Without dead ends: 113 [2022-04-05 04:51:28,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 85.8s TimeCoverageRelationStatistics Valid=800, Invalid=6650, Unknown=36, NotChecked=170, Total=7656 [2022-04-05 04:51:28,957 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 04:51:28,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 154 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 643 Invalid, 0 Unknown, 577 Unchecked, 0.4s Time] [2022-04-05 04:51:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-05 04:51:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2022-04-05 04:51:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:51:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-04-05 04:51:28,966 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 38 [2022-04-05 04:51:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:51:28,967 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-04-05 04:51:28,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 50 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:51:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-04-05 04:51:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 04:51:28,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:51:28,968 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:51:28,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-05 04:51:29,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:51:29,169 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:51:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:51:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1062518689, now seen corresponding path program 2 times [2022-04-05 04:51:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:51:29,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155755008] [2022-04-05 04:51:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:51:29,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:51:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:51:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:29,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 04:51:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:51:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:51:29,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:51:29,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155755008] [2022-04-05 04:51:29,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155755008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:51:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22768983] [2022-04-05 04:51:29,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:51:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:51:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:51:29,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:51:29,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 04:51:29,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:51:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:51:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 04:51:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:51:29,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-04-05 04:51:29,616 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-04-05 04:51:29,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-04-05 04:51:31,653 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-04-05 04:51:31,778 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-05 04:51:31,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-04-05 04:51:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-04-05 04:51:31,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:51:32,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-04-05 04:51:32,149 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-04-05 04:51:32,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 903 treesize of output 848 [2022-04-05 04:51:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:51:32,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22768983] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:51:32,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:51:32,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 31 [2022-04-05 04:51:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330317691] [2022-04-05 04:51:32,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:51:32,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 04:51:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:51:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 04:51:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=774, Unknown=1, NotChecked=56, Total=930 [2022-04-05 04:51:32,726 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:52:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:52:05,510 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2022-04-05 04:52:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 04:52:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-04-05 04:52:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:52:05,513 INFO L225 Difference]: With dead ends: 129 [2022-04-05 04:52:05,513 INFO L226 Difference]: Without dead ends: 127 [2022-04-05 04:52:05,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=294, Invalid=2346, Unknown=16, NotChecked=100, Total=2756 [2022-04-05 04:52:05,514 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 138 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 04:52:05,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 590 Invalid, 0 Unknown, 339 Unchecked, 0.3s Time] [2022-04-05 04:52:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-05 04:52:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-04-05 04:52:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 86 states have (on average 1.186046511627907) internal successors, (102), 87 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:52:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2022-04-05 04:52:05,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 41 [2022-04-05 04:52:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:52:05,556 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2022-04-05 04:52:05,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 28 states have internal predecessors, (66), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:52:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2022-04-05 04:52:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 04:52:05,557 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:52:05,557 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:52:05,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 04:52:05,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 04:52:05,760 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:52:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:52:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1915025960, now seen corresponding path program 1 times [2022-04-05 04:52:05,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:52:05,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020172181] [2022-04-05 04:52:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:52:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:05,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:52:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:52:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:52:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020172181] [2022-04-05 04:52:05,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020172181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:52:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675287169] [2022-04-05 04:52:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:05,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:52:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:52:05,942 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:52:05,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 04:52:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:05,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 04:52:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:52:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:52:06,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:52:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:52:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675287169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:52:06,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:52:06,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-04-05 04:52:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936545199] [2022-04-05 04:52:06,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:52:06,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 04:52:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:52:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 04:52:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-05 04:52:06,356 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:52:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:52:06,830 INFO L93 Difference]: Finished difference Result 231 states and 276 transitions. [2022-04-05 04:52:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 04:52:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-05 04:52:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:52:06,832 INFO L225 Difference]: With dead ends: 231 [2022-04-05 04:52:06,832 INFO L226 Difference]: Without dead ends: 183 [2022-04-05 04:52:06,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-05 04:52:06,833 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 260 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 04:52:06,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 93 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 04:52:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-05 04:52:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2022-04-05 04:52:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 127 states have internal predecessors, (148), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:52:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2022-04-05 04:52:06,865 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 44 [2022-04-05 04:52:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:52:06,865 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2022-04-05 04:52:06,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:52:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2022-04-05 04:52:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 04:52:06,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:52:06,866 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:52:06,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 04:52:07,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 04:52:07,080 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:52:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:52:07,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1328658693, now seen corresponding path program 1 times [2022-04-05 04:52:07,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:52:07,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475200309] [2022-04-05 04:52:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:07,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:52:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:07,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:52:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:07,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 04:52:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:52:07,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:52:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475200309] [2022-04-05 04:52:07,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475200309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:52:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604671718] [2022-04-05 04:52:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:07,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:52:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:52:07,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:52:07,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 04:52:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 04:52:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:52:07,719 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:52:07,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-05 04:52:07,964 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-05 04:52:07,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-04-05 04:52:18,212 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-05 04:52:18,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-04-05 04:52:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:52:18,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:52:36,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-04-05 04:52:36,754 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-04-05 04:52:36,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1679 treesize of output 1549 [2022-04-05 04:52:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:52:37,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604671718] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:52:37,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:52:37,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 42 [2022-04-05 04:52:37,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482236238] [2022-04-05 04:52:37,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:52:37,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-05 04:52:37,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:52:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-05 04:52:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1507, Unknown=16, NotChecked=0, Total=1722 [2022-04-05 04:52:37,259 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:52:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:52:46,970 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-04-05 04:52:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 04:52:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-04-05 04:52:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:52:46,972 INFO L225 Difference]: With dead ends: 221 [2022-04-05 04:52:46,972 INFO L226 Difference]: Without dead ends: 219 [2022-04-05 04:52:46,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=609, Invalid=4773, Unknown=20, NotChecked=0, Total=5402 [2022-04-05 04:52:46,974 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 177 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-05 04:52:46,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 201 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1235 Invalid, 0 Unknown, 570 Unchecked, 0.8s Time] [2022-04-05 04:52:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-05 04:52:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 146. [2022-04-05 04:52:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 137 states have internal predecessors, (161), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:52:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2022-04-05 04:52:46,988 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 46 [2022-04-05 04:52:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:52:46,988 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2022-04-05 04:52:46,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:52:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2022-04-05 04:52:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 04:52:46,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:52:46,988 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:52:47,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 04:52:47,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 04:52:47,204 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:52:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:52:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1678714754, now seen corresponding path program 1 times [2022-04-05 04:52:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:52:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888184283] [2022-04-05 04:52:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:52:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:52:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:47,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-05 04:52:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:52:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:52:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888184283] [2022-04-05 04:52:47,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888184283] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:52:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356413932] [2022-04-05 04:52:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:52:47,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:52:47,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:52:47,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:52:47,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 04:52:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:52:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 04:52:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:52:47,733 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-04-05 04:52:47,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-04-05 04:52:49,768 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_5| Int) (|v_main_~#v~0.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_5|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_5| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_5|))))) is different from true [2022-04-05 04:52:49,835 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-05 04:52:49,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-04-05 04:52:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-04-05 04:52:49,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:52:50,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-04-05 04:52:50,156 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-04-05 04:52:50,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 98 [2022-04-05 04:52:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 04:52:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356413932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:52:50,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:52:50,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 27 [2022-04-05 04:52:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203812086] [2022-04-05 04:52:50,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:52:50,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-05 04:52:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:52:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-05 04:52:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=578, Unknown=1, NotChecked=48, Total=702 [2022-04-05 04:52:50,317 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:53:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:53:17,357 INFO L93 Difference]: Finished difference Result 223 states and 258 transitions. [2022-04-05 04:53:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 04:53:17,357 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-04-05 04:53:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:53:17,358 INFO L225 Difference]: With dead ends: 223 [2022-04-05 04:53:17,359 INFO L226 Difference]: Without dead ends: 221 [2022-04-05 04:53:17,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=249, Invalid=1904, Unknown=13, NotChecked=90, Total=2256 [2022-04-05 04:53:17,360 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 04:53:17,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 116 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 754 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-04-05 04:53:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-05 04:53:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 140. [2022-04-05 04:53:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 131 states have internal predecessors, (154), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:53:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2022-04-05 04:53:17,375 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 46 [2022-04-05 04:53:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:53:17,376 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2022-04-05 04:53:17,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:53:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2022-04-05 04:53:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 04:53:17,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:53:17,376 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:53:17,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 04:53:17,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 04:53:17,592 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:53:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:53:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2059580614, now seen corresponding path program 2 times [2022-04-05 04:53:17,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:53:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309711167] [2022-04-05 04:53:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:53:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:53:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:53:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:53:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:53:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 04:53:18,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:53:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309711167] [2022-04-05 04:53:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309711167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:53:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076034919] [2022-04-05 04:53:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:53:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:53:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:53:18,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:53:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 04:53:18,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:53:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:53:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 04:53:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:53:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:53:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,459 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:53:18,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-04-05 04:53:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:53:18,630 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:53:18,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-04-05 04:53:18,674 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:53:18,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:53:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 04:53:18,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:53:28,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2022-04-05 04:53:28,929 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-05 04:53:28,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 353 treesize of output 338 [2022-04-05 04:53:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 04:53:29,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076034919] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:53:29,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:53:29,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-04-05 04:53:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959656608] [2022-04-05 04:53:29,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:53:29,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-05 04:53:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:53:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-05 04:53:29,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1556, Unknown=8, NotChecked=0, Total=1892 [2022-04-05 04:53:29,196 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:53:32,027 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_main_~#v~0.base|))) (let ((.cse2 (* c_main_~j~0 4)) (.cse0 (select .cse1 0)) (.cse4 (< c_main_~j~0 1)) (.cse5 (= (* c_main_~i~0 4) 0))) (and (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| (- 4) .cse2))) (= |c_#NULL.base| |c_old(#NULL.base)|) (= 8 .cse2) (or |c_main_#t~short10| (forall ((v_ArrVal_354 Int) (v_main_~i~0_47 Int) (v_ArrVal_349 Int)) (or (< (+ c_main_~j~0 1) v_main_~i~0_47) (not (<= c_main_~key~0 v_ArrVal_349)) (< v_main_~i~0_47 2) (let ((.cse3 (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* c_main_~i~0 4) |c_main_~#v~0.offset| 4) v_ArrVal_349) (+ (* v_main_~i~0_47 4) |c_main_~#v~0.offset|) v_ArrVal_354))) (<= (select .cse3 |c_main_~#v~0.offset|) (select .cse3 (+ |c_main_~#v~0.offset| 4))))))) (or (not (<= 0 c_main_~i~0)) .cse4 .cse5) (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| 4))) (<= c_main_~i~0 2) (or .cse4 (not |c_main_#t~short10|) .cse5) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)))) is different from false [2022-04-05 04:53:55,620 WARN L232 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:55:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:55:06,567 INFO L93 Difference]: Finished difference Result 429 states and 527 transitions. [2022-04-05 04:55:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-05 04:55:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-05 04:55:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:55:06,570 INFO L225 Difference]: With dead ends: 429 [2022-04-05 04:55:06,570 INFO L226 Difference]: Without dead ends: 371 [2022-04-05 04:55:06,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4451 ImplicationChecksByTransitivity, 106.8s TimeCoverageRelationStatistics Valid=1938, Invalid=10216, Unknown=60, NotChecked=218, Total=12432 [2022-04-05 04:55:06,573 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 04:55:06,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 131 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1036 Invalid, 0 Unknown, 996 Unchecked, 0.7s Time] [2022-04-05 04:55:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-04-05 04:55:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 185. [2022-04-05 04:55:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 175 states have (on average 1.2285714285714286) internal successors, (215), 176 states have internal predecessors, (215), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:55:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2022-04-05 04:55:06,626 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 46 [2022-04-05 04:55:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:55:06,627 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2022-04-05 04:55:06,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.13953488372093) internal successors, (92), 41 states have internal predecessors, (92), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:55:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2022-04-05 04:55:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 04:55:06,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:55:06,633 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:55:06,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 04:55:06,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:55:06,849 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:55:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:55:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1792607455, now seen corresponding path program 3 times [2022-04-05 04:55:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:55:06,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152021142] [2022-04-05 04:55:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:55:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:55:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:55:07,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:55:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:55:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:55:07,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:55:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152021142] [2022-04-05 04:55:07,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152021142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:55:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867651051] [2022-04-05 04:55:07,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 04:55:07,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:55:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:55:07,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:55:07,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 04:55:07,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 04:55:07,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:55:07,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 04:55:07,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:55:07,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:55:07,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:55:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:55:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:55:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:55:07,828 INFO L356 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2022-04-05 04:55:07,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 52 [2022-04-05 04:55:07,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:55:07,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:55:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-05 04:55:07,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:55:39,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 68 [2022-04-05 04:55:39,858 INFO L356 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2022-04-05 04:55:39,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 412 treesize of output 418 [2022-04-05 04:55:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 04:55:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867651051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:55:40,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:55:40,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 42 [2022-04-05 04:55:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475493382] [2022-04-05 04:55:40,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:55:40,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-05 04:55:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:55:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-05 04:55:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1484, Unknown=15, NotChecked=0, Total=1722 [2022-04-05 04:55:40,060 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 04:55:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:55:43,107 INFO L93 Difference]: Finished difference Result 303 states and 365 transitions. [2022-04-05 04:55:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-05 04:55:43,108 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-04-05 04:55:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:55:43,109 INFO L225 Difference]: With dead ends: 303 [2022-04-05 04:55:43,109 INFO L226 Difference]: Without dead ends: 301 [2022-04-05 04:55:43,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=1363, Invalid=6994, Unknown=15, NotChecked=0, Total=8372 [2022-04-05 04:55:43,111 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 289 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:55:43,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 82 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1342 Invalid, 0 Unknown, 295 Unchecked, 1.0s Time] [2022-04-05 04:55:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-05 04:55:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 158. [2022-04-05 04:55:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 149 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 04:55:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2022-04-05 04:55:43,140 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 46 [2022-04-05 04:55:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:55:43,140 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2022-04-05 04:55:43,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.268292682926829) internal successors, (93), 39 states have internal predecessors, (93), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 04:55:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2022-04-05 04:55:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 04:55:43,149 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:55:43,150 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:55:43,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 04:55:43,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 04:55:43,364 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:55:43,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:55:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1570483864, now seen corresponding path program 3 times [2022-04-05 04:55:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:55:43,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975665938] [2022-04-05 04:55:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:55:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:55:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:55:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:55:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:55:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:55:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:55:43,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975665938] [2022-04-05 04:55:43,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975665938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:55:43,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679463986] [2022-04-05 04:55:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 04:55:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:55:43,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:55:43,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 04:55:43,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 04:55:44,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 04:55:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:55:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 04:55:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:55:44,145 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:55:44,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-05 04:55:44,348 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-04-05 04:55:44,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-04-05 04:55:44,546 INFO L356 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-04-05 04:55:44,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-04-05 04:55:44,748 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-04-05 04:55:44,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-04-05 04:55:44,850 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-04-05 04:55:44,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-04-05 04:55:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 04:55:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:57:48,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2022-04-05 04:57:48,715 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-04-05 04:57:48,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169635 treesize of output 166561 [2022-04-05 04:57:55,312 WARN L232 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 654 DAG size of output: 648 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)